Question about Canon EOS 40D Digital Camera

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Canon 40d-used camera sunday-took cf card to store to make pics-

Left camera in cold car all night -camera dead- charged 4 batteries and camera still wont turn on-nothing at all

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  • Anonymous Mar 31, 2014

    engine wont turn over when cold,used pull cord to turn engine past highest compression, &it will turn over no problem, starts fine when warm,runs fine,changed battery&starter still the same,only 200mls on clock

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Try cleaning the contacts for the batteries with a pencil eraser. Make sure you hold the camera so the eraser debris falls OUT of the battery compartment as you clean. Also make sure the battery door latches properly, and that the batteries are correctly oriented.

Posted on Dec 12, 2008

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2 Answers

No Power To Canon Digital Rebel XT


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May 15, 2008 | Canon Rebel XT / EOS 350D Digital Camera

1 Answer

My Canon 40d keeps saying' CF card not formatted Format card with this camera'. I tried to do that but it says ' Cannot format Change the CF card. I have 6 cards and I've tried them all with the same...


My 40d keep saying the cf card is not formatted. I used three different cards and it says the same thing. Is it anything I can do to fix this problem.

Nov 29, 2010 | Canon EOS 40D Digital Camera

1 Answer

Canon eos 400d error 99, shooting not possible. turn the power swithch on off again or re-instal the battery. It has been doing this for a long time and nothing is working to fix it! Thank you,


1.Remove the battery, lens and CF card. Allow the camera to sit without power for 20 minutes and then reinsert a fully charged battery.
2.Turn the camera on and push the shutter button as if you were taking a picture.
3. If you don't get the error message reattach the lens and insert the CF card.
4. Check the below canon eos 400d service manual link:
http://goo.gl/LHYVAy

it will help you to save a lot of money
Hope it helps, Thanks

Oct 22, 2010 | Canon EOS 40D Digital Camera

1 Answer

Canon 40D and 64Gb CF Card


What i find is that the larger the card the slower the write recovery in taking pictures. If you are an action photographer this is a pain as things happen fast . To have the camera take so long to recover from a write leaves you open to losing some excellent shots. So my rule of thumb is use smaller value cards. If you are just a happy shots photographer then this probably doesn't really matter.

Thanks for using Fixya

Sep 15, 2009 | Canon EOS 40D Body Only Digital Camera

1 Answer

Eos 40d error 99


Error 99 can mean many things. Have you installed the latest firmware for the camera (version 1.1.1)? If you don't have, download it here (for equipment purchased in USA or Puerto Rico):

http://web.canon.jp/imaging/eosd/eos40d/eos40d-firmware-e.html

If you have the latest firmware, try this:

  1. Switch off the camera and remove the CF card and battery
  2. Keep the camera idle for 30 min
  3. Clean all the contacts of the camera (battery contacts, lens contacts etc) with an eraser. Do this keeping the camera facing down so that no debris fall into the camera.
  4. Attach the lens and insert the battery.
  5. Switch on the camera
  6. Insert the CF card
  7. If the error persists, format the card again
  8. If this does not work, try using another CF card.

Feb 06, 2009 | Canon EOS 40D Digital Camera

1 Answer

Canon 40d won't turn on, LCD is blank.


There are several different things that can cause the camera to not start up. Refer to your user manual to check each of these items. If you don't have your user manual, you can download it here.

1) The battery is not properly installed in the camera. (p.26)
2) Make sure the battery compartment cover is closed. (p.26)
3) Make sure the CF card slot cover is closed. (p.28)

In addition, the battery may not have been properly recharged. Double check that the charger is plugged into a working outlet, and double check that it shows that the battery is fully charged.

If none of these fix the problem then you have a defective camera - one of the switches for the battery compartment or the CF card slot cover may be not properly indicating that the door is closed. If that's the case, you need to either return it to the place of purchase as defective, or send it in to Canon for warranty repair.

Dec 26, 2008 | Canon EOS 40D Digital Camera

1 Answer

Err99 40d canon body only


Try the following diagnosis steps: -

To isolate the cause of the issue, do the following: -
1. Turn off the camera.
2. Remove the lens, battery, and CF card.
3. Allow the camera to sit without power for approximately 20 minutes.
4. Insert only a fully charged battery, and turn on the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99" message appear? If so, the camera may be faulty and requires a service. If it does not, then: -
1. Turn off the camera.
2. Insert the CF card.
3. Turn on the camera.
4. Format the CF card in the camera.
5. Depress the shutter button as you would to take a picture.

Does the “ERR 99" message appear? If so, then the CF card is faulty. Try a different card. If the message does not appear: -
1. Turn off the camera.
2. Clean the gold contacts on the lens by GENTLY rubbing them with a pencil eraser or soft cloth. Keeping the camera face pointing down, also clean the gold contacts on the camera, being careful that you do not let any debris fall into the camera body.
3. Reattach your lens.
4. Turn on the camera.
5. Depress the shutter button as you would to take a picture.

If the “ERR 99" message only appears when one particular lens is attached, then that lens should be examined by a service technician.
If you see the “ERR 99" with a different Canon lens attached, then the camera is faulty and should be serviced.

Oct 28, 2008 | Canon EOS 40D Digital SLR Camera Digital...

1 Answer

Err CF


TRy and reformat the CF card through the camera. Youll lose the pics for sure but you cant see them anyway. You can also check for bent pins in the CF slot. Sometimes if you shut down the camera in mid write to the card, itll mess up the cards FAT (file directory)

Feb 24, 2008 | Canon Rebel XT / EOS 350D Digital Camera

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